OPEN DOOR NETWORKS SHIPS THE DOORSTOP PERSONAL FIREWALL

SECURITY SUITE UPGRADES, WHITE PAPER ROUND OUT SECURITY OFFERINGS

ASHLAND, OR. -- November 15, 1999 -- Open Door Networks Inc., the developer
of Mac OS 9's Internet File Sharing, today announced that it had begun
shipping its DoorStop Firewall, Personal Edition. DoorStop Personal is an
easy to use, end-user version of Open Door's powerful server firewall
software, specifically focused on protecting Mac OS 9's new Internet
services. Open Door also announced upgrades to its Security Suites for
Macintosh servers and a white paper on Mac OS 9 Internet security, rounding
out its Mac OS security offerings.

DoorStop Personal Edition, which runs on Macs back to Mac OS 8.1, is an
important security enhancement for any Mac that is connected to the
Internet for long periods of time, for instance through a cable or DSL
modem or an intranet. Although the Mac OS is one of the most secure,
today's increasingly popular permanent connections, in combination with Mac
OS 9's new Internet features, significantly increase the Mac's exposure and
warrant additional protection beyond that provided by the OS itself.

DoorStop was originally developed by Open Door for use on servers such as
AppleShare IP and Open Door's ShareWay IP Professional. DoorStop Personal
Edition is a greatly simplified version of the server product, and makes
protecting Mac OS TCP/IP services as simple as clicking on the services'
icons. DoorStop Personal Edition requires a PowerPC Mac and Mac OS 8.1 or
later. Its features include:

- Built-in support for Internet file sharing (through Mac OS 9's file
sharing and ShareWay IP)
- Built-in support for Mac OS 9's Program Linking over TCP/IP
- An advanced mode for protecting any TCP/IP service
- Logging of allowed and/or denied TCP/IP connections.
- Online help

Details on DoorStop, including a free evaluation release of DoorStop
Personal Edition, are available from http://www.opendoor.com/doorstop/ .
DoorStop Personal Edition pricing ranges from $59 ($49 educational) for
single licenses, up through $1299 ($999 educational) for 50 user licenses.
DoorStop Personal can also be purchased with ShareWay IP 3.0 Personal
Edition for $99 ($89 educational) or with a ShareWay IP 3.0 upgrade for $79
($69 educational). Additional volume and site licenses are also available.

The DoorStop firewall is a major component of Open Door's overall security
offerings. In addition to its previous announcement of ShareWay IP 3.0, a
major security upgrade for Internet file sharing, (see "Open Door Networks
Enhances Mac OS 9 with New Products"), Open Door's security offerings now
include:

- Today's newly announced upgrades to its Security for AppleShare IP and
Security Suite for WebSTAR. The free upgrades provide Mac OS 9
compatibility in addition to addressing new security issues introduced by
the latest releases of these servers (AppleShare IP 6.3 and WebSTAR 4.0).
Details on the Suites are available at http://www.opendoor.com/asipsuite/
and http://www.opendoor.com/webstarsuite/ .

- A newly announced white paper detailing the ways in which security
components, including DoorStop, ShareWay IP 3.0 and the Security Suites,
work in concert with the Mac OS to make up a comprehensive Internet
security solution. The white paper, "Understanding and Enhancing Mac OS
Internet Security," is available from
http://www.opendoor.com/doorstop/MacOSsecurity.html .

Open Door Networks, Inc. is the leading provider of tools that aid in the
rapidly accelerating migration of Macintosh networks from AppleTalk to
Internet protocols. Open Door was founded in January, 1995 by Alan
Oppenheimer, an 11-year Apple veteran and co-creator of the AppleTalk
network system. Open Door's mission is to provide Macintosh users with
Internet solutions that are as easy-to-use and as powerful as the Macintosh
itself. Open Door Networks is located in Ashland, Oregon.